LITEON EZ-DUB and DVD Recognition Issues with USB

I have a DELL Latitiude D620 and I have 2 problems with the getting the LITEON LH-20A1P-03C DVD Drive recognized by Windows XP consistently. I have reinstalled the Intel USB drivers from the DELL Web Site and have a choice of Intel 820801G (ICH7 Family) USB 2 Enhanced Host Controller as well as the regular USB ones and the drivers keep comong up as not having passed Windows Logo testing (maybe it's a DELL thing!).  This message about not having passed logo testing comes up with every USB device that I add.

1st Problem - I start up the laptop and when I plug in the DVD drive it is seen just fine.  I unplug it and plug it back in and it is no loger seen and is to be found with a yellw exclaimation mark and will not work again until the laptop is restarted.

2nd Problem - This product comes with software called EZ-DUB which allows one touch backups as well as DVD copying.  It has an application calles EZ-DUB finder which shows up on the tool bar with aother system applications, but cannot see the DVD drive whatever I do.  I have also got some other applications, such as AnyDVD that I have stopped, but I still cannot get this to work.

I believe that the problems are linked in someway, but cannot seem to get to the bottom of this one.